542 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. t-^^^' 



Poniaula:^ undosus Wood. 



Common. 

 Liotia acuticostata Cpr. 



Sail Diego. Rare. 

 Omphalius fuscescens Phil. 



Abundant on rocky beaches. Also Todos Santos Bay. 

 Omphalius aureotinctus Fbs. 



Rocky ocean beaches. Not rare. 

 Chlorostoma funebrale A. Ad. 



Common on shingle beaches. 

 Chlorostoma gallina Fbs. 



Rocky ocean beaches; abundant. Also Todos Santos Bay. The 

 young are sometimes of a brick-red color. 

 Chlorostoma brunnea Phil. 



One from a shingle beach at Todos Santos Bay. 

 Chlorostoma pfeifferi Phil. 



One dead specimen from San Diego. 

 Norrisia norrisii Shy. 



Abundant on kelp along the coast. 

 Calliostoma canaliculatum Mart. 

 • On kelp, specimens are rarely washed ashore. 

 Calliostoma annulatum Mart. 



I have one specimen from from a San Diego beach. 

 Calliostoma costastum Mart. 



Not often washed ashore. 

 Calliostoma gemmiulatum Cpr. 



Often washed ashore at San Diego and Todos Santos Bay. 

 Leptothyra bacula Cpr. 



Abundant under rocks along the ocean beaches. 

 Leptothyra paucilirata Dall. 



Rare. 



[Specimens sent were of a magnificent crimson color. D.] 



Leptothyra sanguinea var. lurida Dall. 



Less common than the last. 



[This form has a dull olivaceous cast sometimes mottled with whitish. 

 The sculpture is more compact and closer, the nacre less brilliant than 

 that of Monterey specimens ; they are also smaller on the average. D.] 

 Haliotis assimilis Dall. 



Numerous dead specimens are washed ashore at the boundary beach 

 from deep water. 

 Haliotis cracherodii Leach. 



Abundant at common low water on rocky beaches ; very variable. 

 Also Todos Santos Bay. 

 Haliotis splendens Rve. 



Numerous at very low water on ocean beaches beneath bowlders. Col- 

 lected extensively by the Indians on Todos Santos Bay daring the 

 spring. 



